Death Grip (Ex)

A creature that is grappled by a giant hellgrammite continues to be grappled when the giant hellgrammite is killed and takes 1d6+4 points of damage each round at the start of its turn unless it succeeds at a DC 22 Escape Artist check or a DC 20 Strength check, or until the hellgrammite’s corpse takes an additional 10 points of damage.